[Radiological measurement of heart size in pediatrics. 1. Normal children].
D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006321:Heart / Q000000981:diagnostic imaging*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature; D011859:Radiography; D012119:Respiration